US5914689A - Antenna for a portable, wireless communication device - Google Patents
Antenna for a portable, wireless communication device Download PDFInfo
- Publication number
- US5914689A US5914689A US08/882,133 US88213397A US5914689A US 5914689 A US5914689 A US 5914689A US 88213397 A US88213397 A US 88213397A US 5914689 A US5914689 A US 5914689A
- Authority
- US
- United States
- Prior art keywords
- bore
- sheath
- antenna
- antenna element
- outer ends
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000003989 dielectric material Substances 0.000 claims description 10
- 238000010276 construction Methods 0.000 claims description 9
- 230000001419 dependent effect Effects 0.000 description 4
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
- H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
- H01Q11/08—Helical antennas
- H01Q11/083—Tapered helical aerials, e.g. conical spiral aerials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
- H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
- H01Q11/08—Helical antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
- H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
- H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
Definitions
- This invention relates to an antenna and more particularly to an antenna for a portable, wireless communication device having a unique sheath design.
- Antennas for portable, wireless communication devices such as two-way radios, cellular telephones, etc., normally include a thermoplastic or rubber sheath which encloses the mechanical components of the antenna.
- the conventional antenna includes an electrically conductive connector positioned at the base of the antenna for connection to the circuitry of the radio.
- the conventional antenna normally also includes at least one helical radiating antenna element electrically connected to the connector and which extends therefrom.
- a pair of series-connected, helical radiating antenna elements are employed. The length of the helical radiating antenna elements is determined by the frequency of the antenna.
- the sheaths for the antennas are normally manufactured to accommodate specific antenna elements having a particular frequency.
- the conventional antennas normally employ a cap which is secured to the tip end of the antenna for sealing the interior of the antenna.
- a cap which is secured to the tip end of the antenna for sealing the interior of the antenna.
- An antenna for a portable, wireless communication device which includes an elongated, hollow sheath comprised of a dielectric material and including a base end and a tip end.
- the sheath has a first bore formed therein which extends inwardly into the base end thereof and which is adapted to receive an electrically conductive connector element therein.
- the sheath also has a second bore formed therein which extends inwardly from the inner end of the first bore towards the tip end and which is adapted to receive a first helical radiating antenna element therein which is electrically connected to the connector element in the first bore.
- the sheath also has a third bore formed therein which extends inwardly from the inner end of the second bore towards the tip end and which is adapted to receive a second helical radiating antenna element therein which is electrically connected to the first helical radiating antenna element.
- the sheath has a plurality of longitudinally extending, radially spaced-apart ribs which extend into the second and third bores for engagement with the antenna elements therein.
- the ribs provided in the second and third bores engage the helical antenna elements so that the antenna elements will not rattle inside the sheath. Further, the ribs provided in the second and third bores create air dielectric chambers therebetween.
- the sheath is of one-piece construction to eliminate the disadvantages of the prior art wherein a separate cap was bonded onto the end of the sheath. The length of the sheath is constant regardless of the frequency of the antenna.
- Still another object of the invention is to provide an antenna including an elongated sheath which is adapted to fit multiple frequency antennas.
- Yet another object of the invention is to provide a unique antenna sheath which reduces the cost of tooling.
- Still another object of the invention is to provide an antenna having improved performance which has the same overall length regardless of frequency.
- Still another object of the invention is to provide an antenna sheath having means therein for preventing the antenna elements from rattling within their respective compartments in the sheath.
- Still another object of the invention is to provide an antenna which eliminates the snug fitting construction of the prior art thereby preventing a drop in dielectric loading and detuning normally caused by a snug fitting sheath.
- Still another object of the invention is to provide an antenna which is economical of manufacture, durable in use and refined in appearance.
- FIG. 1 is a perspective view of the antenna of this invention with a portion thereof cut-away to more fully illustrate the invention
- FIG. 2 is an enlarged sectional view as seen on lines 2--2 of FIG. 1;
- FIG. 3 is an enlarged sectional view as seen on lines 3--3 of FIG. 1;
- FIG. 4 exploded perspective view of the internal components of three different embodiments of the antenna
- FIG. 5 is an exploded perspective view of one form of the antenna
- FIG. 6 is a longitudinal sectional view of one form of the antenna
- FIG. 7 is a longitudinal sectional view of a second form of the antenna.
- FIG. 8 is a longitudinal sectional view of a third form of the antenna.
- the antenna of this invention is referred to generally by the reference numeral 10 and generally includes a sheath 12 adapted to enclose the mechanical components of the antenna as will be described hereinafter.
- sheath 12 is constructed of a suitable conventional, dielectric thermoplastic or rubber material.
- Antenna 10 includes a connector 14 which is adapted to be electrically conducted to the circuitry of the wireless communication device in conventional fashion.
- the numeral 16 refers to an antenna spring which is crimped or soldered to the connector 14.
- Antenna spring 16 includes a first helical antenna element 18 and a second helical antenna element 20.
- the length of the antenna element 18 will be dependent upon the frequency of the antenna.
- the length of the antenna element 20 will also be dependent upon the frequency of the antenna.
- the overall length of the spring 16 will be dependent upon the frequency of the antenna.
- antenna element 20 will be utilized in conjunction with antenna element 18, it is conceivable that in some situations only antenna element 18 will be required or vice versa. As seen in the drawings, antenna element 18 has a greater diameter than antenna element 20.
- antenna spring 16 could be comprised of a single spring, tapered or non-tapered, or a pair or individual springs.
- FIG. 4 illustrates three different configurations that antenna spring 16 may assume and which are identified by the reference numerals 16, 16' and 16", respectively. Those three antenna springs 16, 16' and 16" are also illustrated in FIGS. 6, 7 and 8, respectively. As seen, sheath 12 easily accommodates many different antenna spring configurations. Further, spring 16 could be replaced by a single, elongated wire or rod antenna element.
- Sheath 12 includes a first bore 22 formed in its base end 24 and which extends inwardly thereinto. The configuration of the bore 22 will be dependent upon the exterior configuration of the particular connector 14 being utilized so that the connector 14 will be securely received within bore 22. Sheath 12 also includes a second bore 26 formed therein which extends inwardly from the inner end of bore 22 towards the tip end 28 of the sheath. Sheath 12 is also provided with a third bore 30 formed therein which extends inwardly from the inner end of bore 26, as seen in the drawings. A shoulder 32 is defined between bores 26 and 30. It should be noted that sheath 12 may be designed so as to have a single bore, tapered or non-tapered. It is also important to note that sheath 12 does not utilize an external, separate cap to close its upper or tip end.
- Sheath 12 is provided with a plurality of elongated ribs 34 which protrude inwardly into bore 26, as illustrated in FIGS. 2, 3 and 5-8. As seen, the ribs 34 are radially spaced-apart and it is preferred that four of the ribs 34 be provided. Sheath 12 is also provided with a plurality of elongated ribs 36 which are radially spaced-apart and which extend inwardly into bore 30, as seen in FIGS. 2, 3 and 5-8. As seen in the drawings, ribs 34 have an overall "height" which is less than that of ribs 36 so that ribs 34 protrude less into the bore 26 than ribs 36 in bore 30.
- the ribs 34 and 36 are essentially V-shaped in section. It is preferred also that the ribs 34 and 36 are tapered from one end thereof to the other end thereof, that is, the ribs have a greater "height" at their lower ends than at their upper ends.
- the antenna is assembled in an easy fashion by simply inserting the connector 14 having the antenna spring 16 mounted thereon into the base end of the sheath.
- antenna element 20 When assembled, antenna element 20 is positioned in bore 30 with the ribs 36 engaging the exterior of the antenna element 20 to maintain the antenna element 20 in position so that it does not rattle within the sheath.
- the ribs 34 engage the exterior of antenna element 18 to maintain the antenna element 18 in position so that it does not rattle.
- the engagement of the ribs 34 and 36 with the antenna elements 18 and 20 creates controlled dielectric chambers 38 between the sheath and the antenna elements 18 and 20.
- the antenna of this invention allows a single sheath to fit multiple frequency antennas, thereby reducing the cost of tooling and design cycle time. Further, the antenna of this invention provides an improved performance with the same overall length regardless of frequency.
- the lengths of bores 26 and 30 are such that they can accommodate antenna elements of various lengths. In some cases, depending upon the frequency of the antenna, the antenna element 20 will not extend to the inner end of the bore 30. Similarly, in some situations, the inner end of antenna element 18 will not extend completely to the inner end of bore 26, as seen in FIGS. 7 and 8. Further, in some situations, it is possible that the outer (lower) end of antenna element 20 will be partially positioned in bore 26 with the inner end thereof being positioned in bore 30 with the ribs 36 engaging the antenna element 20 to maintain the same in position without
Abstract
Description
Claims (31)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/882,133 US5914689A (en) | 1997-06-25 | 1997-06-25 | Antenna for a portable, wireless communication device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/882,133 US5914689A (en) | 1997-06-25 | 1997-06-25 | Antenna for a portable, wireless communication device |
Publications (1)
Publication Number | Publication Date |
---|---|
US5914689A true US5914689A (en) | 1999-06-22 |
Family
ID=25379960
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/882,133 Expired - Lifetime US5914689A (en) | 1997-06-25 | 1997-06-25 | Antenna for a portable, wireless communication device |
Country Status (1)
Country | Link |
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US (1) | US5914689A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6166707A (en) * | 1996-04-01 | 2000-12-26 | Motorola, Inc. | Antenna shroud for a portable communications device |
US6172655B1 (en) * | 1999-02-12 | 2001-01-09 | Lockheed Martin Corporation | Ultra-short helical antenna and array thereof |
US6473056B2 (en) * | 2000-06-12 | 2002-10-29 | Filtronic Lk Oy | Multiband antenna |
WO2007104568A1 (en) * | 2006-03-16 | 2007-09-20 | Kathrein-Werke Kg | Multiple strip spiral spring rod antenna for motor vehicles, and method for the production thereof |
US20080010810A1 (en) * | 2004-07-28 | 2008-01-17 | Pozzobon Frank | Coded antenna |
US20080062067A1 (en) * | 2006-09-13 | 2008-03-13 | Antenex, Inc. | Antenna cover |
CN110581338A (en) * | 2019-08-15 | 2019-12-17 | 武汉慧联无限科技有限公司 | Gateway equipment is with antenna that has heat dissipation function |
Citations (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3803627A (en) * | 1972-07-24 | 1974-04-09 | O Schuscheng | Motor-driven, telescoping antenna for automobiles |
US4205319A (en) * | 1978-05-05 | 1980-05-27 | Motorola, Inc. | Flexible dipole antenna for hand-held two-way radio |
US4760401A (en) * | 1986-01-28 | 1988-07-26 | General Research Of Electronics, Inc. | Removable rod antenna |
US4772895A (en) * | 1987-06-15 | 1988-09-20 | Motorola, Inc. | Wide-band helical antenna |
US4849767A (en) * | 1987-04-21 | 1989-07-18 | Nippon Tsushin Densen Company, Ltd. | Helical antenna for small portable wireless devices |
US4867698A (en) * | 1988-02-03 | 1989-09-19 | Amp Incorporated | Antenna Connector |
JPH03245603A (en) * | 1990-02-23 | 1991-11-01 | Toshiba Corp | Antenna |
US5079558A (en) * | 1988-11-08 | 1992-01-07 | Kabushiki Kaisha Toshiba | Extendable antenna device |
US5177492A (en) * | 1991-05-07 | 1993-01-05 | Fujitsu Limited | Rod antenna mounting mechanism of radio terminal equipment |
US5204687A (en) * | 1990-07-19 | 1993-04-20 | Galtronics Ltd. | Electrical device and electrical transmitter-receiver particularly useful in a ct2 cordless telephone |
US5245350A (en) * | 1991-07-13 | 1993-09-14 | Nokia Mobile Phones (U.K.) Limited | Retractable antenna assembly with retraction inactivation |
JPH0685519A (en) * | 1992-09-03 | 1994-03-25 | Nhk Spring Co Ltd | Whip antenna for radio communication |
US5300940A (en) * | 1991-07-12 | 1994-04-05 | Centurion International, Inc. | Broadband antenna |
US5317325A (en) * | 1991-03-16 | 1994-05-31 | Antenna Products Limited | Radio antennas |
JPH06252621A (en) * | 1993-02-26 | 1994-09-09 | Sony Corp | Antenna system |
US5353036A (en) * | 1991-07-13 | 1994-10-04 | Nokia Mobile Phones (U.K.) Limited | Dual antenna assembly with antenna retraction inactivation |
US5374937A (en) * | 1991-07-08 | 1994-12-20 | Nippon Telegraph And Telephone Corporation | Retractable antenna system |
US5446469A (en) * | 1993-01-14 | 1995-08-29 | Nippon Antenna Co., Ltd. | Extendible whip antenna |
US5467096A (en) * | 1993-02-25 | 1995-11-14 | Nec Corporation | Antenna for a radio communication apparatus |
US5469177A (en) * | 1993-09-15 | 1995-11-21 | Motorola, Inc. | Antenna assembly and method therefor |
US5479178A (en) * | 1993-05-21 | 1995-12-26 | Samsung Electronics Co., Ltd. | Portable radio antenna |
US5594457A (en) * | 1995-04-21 | 1997-01-14 | Centurion International, Inc. | Retractable antenna |
US5646635A (en) * | 1995-08-17 | 1997-07-08 | Centurion International, Inc. | PCMCIA antenna for wireless communications |
US5659889A (en) * | 1995-01-04 | 1997-08-19 | Centurion International, Inc. | Radio with antenna connector having high and low impedance points |
US5686927A (en) * | 1995-11-03 | 1997-11-11 | Centurion International, Inc. | Retractable antenna |
-
1997
- 1997-06-25 US US08/882,133 patent/US5914689A/en not_active Expired - Lifetime
Patent Citations (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3803627A (en) * | 1972-07-24 | 1974-04-09 | O Schuscheng | Motor-driven, telescoping antenna for automobiles |
US4205319A (en) * | 1978-05-05 | 1980-05-27 | Motorola, Inc. | Flexible dipole antenna for hand-held two-way radio |
US4760401A (en) * | 1986-01-28 | 1988-07-26 | General Research Of Electronics, Inc. | Removable rod antenna |
US4849767A (en) * | 1987-04-21 | 1989-07-18 | Nippon Tsushin Densen Company, Ltd. | Helical antenna for small portable wireless devices |
US4772895A (en) * | 1987-06-15 | 1988-09-20 | Motorola, Inc. | Wide-band helical antenna |
US4867698A (en) * | 1988-02-03 | 1989-09-19 | Amp Incorporated | Antenna Connector |
US5079558A (en) * | 1988-11-08 | 1992-01-07 | Kabushiki Kaisha Toshiba | Extendable antenna device |
JPH03245603A (en) * | 1990-02-23 | 1991-11-01 | Toshiba Corp | Antenna |
US5204687A (en) * | 1990-07-19 | 1993-04-20 | Galtronics Ltd. | Electrical device and electrical transmitter-receiver particularly useful in a ct2 cordless telephone |
US5317325A (en) * | 1991-03-16 | 1994-05-31 | Antenna Products Limited | Radio antennas |
US5177492A (en) * | 1991-05-07 | 1993-01-05 | Fujitsu Limited | Rod antenna mounting mechanism of radio terminal equipment |
US5374937A (en) * | 1991-07-08 | 1994-12-20 | Nippon Telegraph And Telephone Corporation | Retractable antenna system |
US5300940A (en) * | 1991-07-12 | 1994-04-05 | Centurion International, Inc. | Broadband antenna |
US5353036A (en) * | 1991-07-13 | 1994-10-04 | Nokia Mobile Phones (U.K.) Limited | Dual antenna assembly with antenna retraction inactivation |
US5245350A (en) * | 1991-07-13 | 1993-09-14 | Nokia Mobile Phones (U.K.) Limited | Retractable antenna assembly with retraction inactivation |
JPH0685519A (en) * | 1992-09-03 | 1994-03-25 | Nhk Spring Co Ltd | Whip antenna for radio communication |
US5446469A (en) * | 1993-01-14 | 1995-08-29 | Nippon Antenna Co., Ltd. | Extendible whip antenna |
US5467096A (en) * | 1993-02-25 | 1995-11-14 | Nec Corporation | Antenna for a radio communication apparatus |
JPH06252621A (en) * | 1993-02-26 | 1994-09-09 | Sony Corp | Antenna system |
US5479178A (en) * | 1993-05-21 | 1995-12-26 | Samsung Electronics Co., Ltd. | Portable radio antenna |
US5469177A (en) * | 1993-09-15 | 1995-11-21 | Motorola, Inc. | Antenna assembly and method therefor |
US5659889A (en) * | 1995-01-04 | 1997-08-19 | Centurion International, Inc. | Radio with antenna connector having high and low impedance points |
US5594457A (en) * | 1995-04-21 | 1997-01-14 | Centurion International, Inc. | Retractable antenna |
US5646635A (en) * | 1995-08-17 | 1997-07-08 | Centurion International, Inc. | PCMCIA antenna for wireless communications |
US5686927A (en) * | 1995-11-03 | 1997-11-11 | Centurion International, Inc. | Retractable antenna |
Non-Patent Citations (2)
Title |
---|
Doug DeMaw "Lightweight Trap Antennas--Some Thoughts", pp. 15-18, Jun. 1983. |
Doug DeMaw Lightweight Trap Antennas Some Thoughts , pp. 15 18, Jun. 1983. * |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6166707A (en) * | 1996-04-01 | 2000-12-26 | Motorola, Inc. | Antenna shroud for a portable communications device |
US6172655B1 (en) * | 1999-02-12 | 2001-01-09 | Lockheed Martin Corporation | Ultra-short helical antenna and array thereof |
US6473056B2 (en) * | 2000-06-12 | 2002-10-29 | Filtronic Lk Oy | Multiband antenna |
US20080010810A1 (en) * | 2004-07-28 | 2008-01-17 | Pozzobon Frank | Coded antenna |
US7555827B2 (en) * | 2004-07-28 | 2009-07-07 | Pozzobon Frank | Manufacturing coded antenna |
WO2007104568A1 (en) * | 2006-03-16 | 2007-09-20 | Kathrein-Werke Kg | Multiple strip spiral spring rod antenna for motor vehicles, and method for the production thereof |
US20080062067A1 (en) * | 2006-09-13 | 2008-03-13 | Antenex, Inc. | Antenna cover |
US7525505B2 (en) * | 2006-09-13 | 2009-04-28 | Antenex, Inc. | Antenna cover |
CN110581338A (en) * | 2019-08-15 | 2019-12-17 | 武汉慧联无限科技有限公司 | Gateway equipment is with antenna that has heat dissipation function |
CN110581338B (en) * | 2019-08-15 | 2020-12-29 | 武汉慧联无限科技有限公司 | Gateway equipment is with antenna that has heat dissipation function |
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Owner name: CENTURION INTERNATIONAL, INC., NEBRASKA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:COCKSON, MARK G.;REEL/FRAME:008853/0628 Effective date: 19970624 |
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